package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnOverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从开始到结束的所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date对应的营业额(已完成的订单金额总和)
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double tuenover = orderMapper.sumByMap(map);
            tuenover = tuenover == null ? 0.0 : tuenover;
            turnoverList.add(tuenover);

        }
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }
    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从开始到结束的所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //每天新增用户和每天的总用户
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totleUserList = new ArrayList<>();

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("end",endTime);
            //总用户数量
            Integer totleUser = userMapper.countByMap(map);
            //新增用户数量
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            totleUserList.add(totleUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(totleUserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }
    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从开始到结束的所有日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //每天的订单总数
        List<Integer> orderCountList = new ArrayList<>();
        //每天的有效订单总数
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate localDate : dateList) {
            //查询每天的订单总数
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            //查询每天的有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //计算订单总数
        Integer totleOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate = 0.0;
        if (totleOrderCount != 0)
            orderCompletionRate = (double) (validOrderCount / totleOrderCount);
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totleOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end, Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }
    /**
     * 销量排名top10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(names,","))
                .numberList(StringUtils.join(numbers,","))
                .build();
    }
    /**
     * 导出运营数据报表
     * @param response
     */
    @Autowired
    private WorkspaceService workspaceService;
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        /**
         * 查询最近30天的数据库获得数据
         */
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        /**
         * 通过POI写入EXCIL
         */
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于模板文件创建
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            /**
             * 填充数据（时间区间）
             */
            //获取Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            //在该Sheet页上操作第2行第2列
            sheet.getRow(1).getCell(1).setCellValue("时间：" + begin + "--->" + end);
            /**
             * 填充营业额
             */
            sheet.getRow(3).getCell(2).setCellValue(businessDataVO.getTurnover());
            /**
             * 订单完成率
             */
            sheet.getRow(3).getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            /**
             * 新增用户数
             */
            sheet.getRow(3).getCell(6).setCellValue(businessDataVO.getNewUsers());
            /**
             * 有效订单
             */
            sheet.getRow(4).getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            /**
             * 平均客单价
             */
            sheet.getRow(4).getCell(4).setCellValue(businessDataVO.getUnitPrice());

            /**
             * 填充明细数据
             */
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //查询一天的数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                sheet.getRow(7 + i).getCell(1).setCellValue(date.toString());
                sheet.getRow(7 + i).getCell(2).setCellValue(businessDataVO.getTurnover());
                sheet.getRow(7 + i).getCell(3).setCellValue(businessDataVO.getOrderCompletionRate());
                sheet.getRow(7 + i).getCell(4).setCellValue(businessDataVO.getNewUsers());
                sheet.getRow(7 + i).getCell(5).setCellValue(businessDataVO.getValidOrderCount());
                sheet.getRow(7 + i).getCell(6).setCellValue(businessDataVO.getUnitPrice());
            }



            /**
             * 通过输出流将EXCIL文件下载到浏览器
             */
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

            /**
             * 关闭资源
             */
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
